package com.servlet.alipay;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.config.AlipayConfig;
import com.entity.Order;
import com.service.OrderService;
import com.service.impl.OrderServiceImpl;

/**
 * Servlet implementation class AliPayServlet
 */
@WebServlet("/aliPayServlet")
public class AliPayServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	private OrderService orderService = new OrderServiceImpl();

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html;charset=utf-8");
		//获得初始化的AlipayClient
		AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
		
		//设置请求参数
		AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
		alipayRequest.setReturnUrl(AlipayConfig.return_url);
		alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
		
		Order order = orderService.findByOrderNO(request.getParameter("orderNO"));
		alipayRequest.setBizContent("{\"out_trade_no\":\""+ order.getOrderNO() +"\"," 
				+ "\"total_amount\":\""+ order.getAmount() +"\"," 
				+ "\"subject\":\""+ order.getSubject() +"\"," 
				+ "\"body\":\""+ order.getBody() +"\"," 
				+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
		
		//若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
		//alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\"," 
		//		+ "\"total_amount\":\""+ total_amount +"\"," 
		//		+ "\"subject\":\""+ subject +"\"," 
		//		+ "\"body\":\""+ body +"\"," 
		//		+ "\"timeout_express\":\"10m\"," 
		//		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
		//请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节
		
		try {
			//请求
			String result = alipayClient.pageExecute(alipayRequest).getBody();
			
			PrintWriter out = response.getWriter();
			//输出
			out.println(result);
			out.flush();
			out.close();
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
